Author(s): Weijin Pan; Yulei Xie

Linked Author(s):

Keywords: Climate change; TWSA; Pearl River Basin; Relative contributions; Interactions

Abstract: The spatial and temporal distribution of terrestrial water storage (TWS) can be influenced by climatic change. However, studies on Pearl River Basin (PRB) terrestrial water storage anomalies (TWSA) spatial and temporal heterogeneity and drivers are extremely lacking. Therefore, In this study, we investigated the variation of TWSA in the PRB during 2003-2017, subsequently analyzed the relationship between TWSA and climate change, and proposed the use of Geodetector Model (GDM) on a seasonal scale to reveal the role of different factors of climate change in driving the spatial variability of the PRB. The results show that (1) TWSA in the PRB increased significantly at a rate of 5.63 ± 0.77 mm/a over the fifteen years. The effects of precipitation (PRE), potential evapotranspiration (PET), Land Surface Temperature (LST), and NDVI, on the spatial variability of TWSA differed significantly in each season. For PRB, the relative contributions of PRE to TWSA or the interactions of PRE and other factors to TWSA always occupy a dominant position. These conclusions can provide beneficial guidance for managing and assessing local water resources.

DOI: https://doi.org/10.3850/iahr-hic2483430201-208

Year: 2024